Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield

Mahir Al-ani, Simon Barrans, Jeff Carter

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

For high-speed applications, the surface-mounted permanent magnet (SPM) machine is preferred due to its high torque density and efficiency. However, induced eddy currents in the rotor conductive parts result in a loss of efficiency and rotor heating. Therefore, several methods to reduce such losses have been proposed in the literature including copper shielding. In this paper, a high-speed SPM machine rotor with a copper shield is designed and investigated both electromagnetically and mechanically. Several quantitative investigations including placing the copper sheet around the retaining sleeve or magnets, different copper sheet and airgap thicknesses, different retaining sleeve materials, different harmonic contents in the current waveform, i.e. pulse amplitude modulation (PAM) and pulse width modulation (PWM) generated waveforms, and different frequencies and current levels are reported. Additionally, a mechanical analysis investigating possible failure modes of the rotor with the copper sheet is reported.
LanguageEnglish
Title of host publication2017 IEEE International Electric Machines and Drives Conference (IEMDC)
Number of pages8
ISBN (Electronic)9781509042814
DOIs
Publication statusPublished - 8 Aug 2017
EventIEEE International Electric Machines & Drives Conference 2017 - Miami, United States
Duration: 21 May 201724 May 2017
http://iemdc.org/ (Link to Conference Website )

Conference

ConferenceIEEE International Electric Machines & Drives Conference 2017
Abbreviated titleIEMDC 2017
CountryUnited States
CityMiami
Period21/05/1724/05/17
Internet address

Fingerprint

Permanent magnets
Rotors
Copper
Pulse amplitude modulation
Eddy currents
Shielding
Pulse width modulation
Failure modes
Magnets
Torque
Heating

Cite this

Al-ani, M., Barrans, S., & Carter, J. (2017). Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield. In 2017 IEEE International Electric Machines and Drives Conference (IEMDC) https://doi.org/10.1109/IEMDC.2017.8002055
Al-ani, Mahir ; Barrans, Simon ; Carter, Jeff. / Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield. 2017 IEEE International Electric Machines and Drives Conference (IEMDC). 2017.
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title = "Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield",
abstract = "For high-speed applications, the surface-mounted permanent magnet (SPM) machine is preferred due to its high torque density and efficiency. However, induced eddy currents in the rotor conductive parts result in a loss of efficiency and rotor heating. Therefore, several methods to reduce such losses have been proposed in the literature including copper shielding. In this paper, a high-speed SPM machine rotor with a copper shield is designed and investigated both electromagnetically and mechanically. Several quantitative investigations including placing the copper sheet around the retaining sleeve or magnets, different copper sheet and airgap thicknesses, different retaining sleeve materials, different harmonic contents in the current waveform, i.e. pulse amplitude modulation (PAM) and pulse width modulation (PWM) generated waveforms, and different frequencies and current levels are reported. Additionally, a mechanical analysis investigating possible failure modes of the rotor with the copper sheet is reported.",
keywords = "Copper shield, Conductive shield, SPM, Surface-mounted, Loss reduction, Eddy current loss",
author = "Mahir Al-ani and Simon Barrans and Jeff Carter",
year = "2017",
month = "8",
day = "8",
doi = "10.1109/IEMDC.2017.8002055",
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Al-ani, M, Barrans, S & Carter, J 2017, Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield. in 2017 IEEE International Electric Machines and Drives Conference (IEMDC). IEEE International Electric Machines & Drives Conference 2017, Miami, United States, 21/05/17. https://doi.org/10.1109/IEMDC.2017.8002055

Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield. / Al-ani, Mahir; Barrans, Simon; Carter, Jeff.

2017 IEEE International Electric Machines and Drives Conference (IEMDC). 2017.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield

AU - Al-ani, Mahir

AU - Barrans, Simon

AU - Carter, Jeff

PY - 2017/8/8

Y1 - 2017/8/8

N2 - For high-speed applications, the surface-mounted permanent magnet (SPM) machine is preferred due to its high torque density and efficiency. However, induced eddy currents in the rotor conductive parts result in a loss of efficiency and rotor heating. Therefore, several methods to reduce such losses have been proposed in the literature including copper shielding. In this paper, a high-speed SPM machine rotor with a copper shield is designed and investigated both electromagnetically and mechanically. Several quantitative investigations including placing the copper sheet around the retaining sleeve or magnets, different copper sheet and airgap thicknesses, different retaining sleeve materials, different harmonic contents in the current waveform, i.e. pulse amplitude modulation (PAM) and pulse width modulation (PWM) generated waveforms, and different frequencies and current levels are reported. Additionally, a mechanical analysis investigating possible failure modes of the rotor with the copper sheet is reported.

AB - For high-speed applications, the surface-mounted permanent magnet (SPM) machine is preferred due to its high torque density and efficiency. However, induced eddy currents in the rotor conductive parts result in a loss of efficiency and rotor heating. Therefore, several methods to reduce such losses have been proposed in the literature including copper shielding. In this paper, a high-speed SPM machine rotor with a copper shield is designed and investigated both electromagnetically and mechanically. Several quantitative investigations including placing the copper sheet around the retaining sleeve or magnets, different copper sheet and airgap thicknesses, different retaining sleeve materials, different harmonic contents in the current waveform, i.e. pulse amplitude modulation (PAM) and pulse width modulation (PWM) generated waveforms, and different frequencies and current levels are reported. Additionally, a mechanical analysis investigating possible failure modes of the rotor with the copper sheet is reported.

KW - Copper shield

KW - Conductive shield

KW - SPM

KW - Surface-mounted

KW - Loss reduction

KW - Eddy current loss

UR - http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000223

U2 - 10.1109/IEMDC.2017.8002055

DO - 10.1109/IEMDC.2017.8002055

M3 - Conference contribution

SN - 9781509042821

BT - 2017 IEEE International Electric Machines and Drives Conference (IEMDC)

ER -

Al-ani M, Barrans S, Carter J. Electromagnetic and Mechanical Analysis of High Speed SPM Rotor with Copper Shield. In 2017 IEEE International Electric Machines and Drives Conference (IEMDC). 2017 https://doi.org/10.1109/IEMDC.2017.8002055